The ornamental design for a stringlamp, as shown and described.
FIG. 1 is a front, right side, top perspective view of a string lamp showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an enlarged view of the boxed area labelled 8 in FIG. 1 showing in greater detail the structure of each lamp comprising the spring lamp of the present invention.
The broken lines depict portions of the spring lamp that form no part of the claimed design.